Internet runs extremely slow now

question

The Internet runs extremely slow now, I can't log into MSN Messenger (only works 1 out of 10 attempts).
Websites take minutes to load and you get 'Internet Explorer Cannot Display This Page'

answer

In an administrator privileged command prompt, enter
netsh interface tcp set global autotuninglevel=disabled

get to command prompt by clicking Start then in the search box (was the Run box), type cmd